GENOA SYSTEMS CORPORATION

TURBOEXPRESS 486PCI-4G

Processor              80486SX/80486Overdrive/80487SX/80486DX/80486DX2
Processor Speed        25/33/50(internal)/66(internal)MHz
Chip Set               Unidentified
Video Chip Set         None
Maximum Onboard Memory 128MB
Maximum Video Memory   None
Cache                  128/256/512KB
BIOS                   Award
Dimensions             254mm x 218mm
I/O Options            32-bit PCI slots (4)
NPU Options            None

[Image]

                                CONNECTIONS

  Purpose                  Location     Purpose                 Location

  Power LED & keylock        JP17       Turbo LED                 JP20

  Speaker                    JP18       Turbo switch              JP21

  Reset switch               JP19       32-bit PCI slots        PC1 – PC4

                DRAM CONFIGURATION

      Size            Bank 0           Bank 1

       2MB        (2) 256K x 36         None

       4MB        (2) 512K x 36         None

       4MB        (2) 256K x 36    (2) 256K x 36

       6MB        (2) 512K x 36    (2) 256K x 36

       8MB         (2) 1M x 36          None

       8MB        (2) 512K x 36    (2) 512K x 36

      10MB         (2) 1M x 36     (2) 256K x 36

      12MB         (2) 1M x 36     (2) 512K x 36

      16MB         (2) 2M x 36          None

      16MB         (2) 1M x 36      (2) 1M x 36

      18MB         (2) 2M x 36     (2) 256K x 36

      20MB         (2) 2M x 36     (2) 512K x 36

      24MB         (2) 1M x 36      (2) 2M x 36

      32MB         (2) 4M x 36          None

      32MB         (2) 2M x 36      (2) 2M x 36

      34MB         (2) 4M x 36     (2) 256K x 36

      36MB        (2) 512K x 36     (2) 4M x 36

      40MB         (2) 4M x 36      (2) 1M x 36

      48MB         (2) 2M x 36      (2) 4M x 36

      64MB         (2) 8M x 36          None

      64MB         (2) 4M x 36      (2) 4M x 36

      66MB         (2) 8M x 36     (2) 256K x 36

      68MB        (2) 512K x 36     (2) 8M x 36

      72MB         (2) 8M x 36      (2) 1M x 36

      80MB         (2) 2M x 36      (2) 8M x 36

      96MB         (2) 8M x 36      (2) 4M x 36

      128MB        (2) 8M x 36      (2) 8M x 36

  Note: Banks are interchangeable.

                      CACHE CONFIGURATION

      Size          Bank 0          Bank 1           TAG

     128KB        (4) 32K x 8        None        (1) 32K x 8

     256KB        (4) 32K x 8     (4) 32K x 8    (1) 32K x 8

     512KB       (4) 128K x 8        None        (1) 32K x 8

                        CACHE JUMPER CONFIGURATION

     Size           JP2            JP3            JP12           JP13

    128KB        Pins 1 & 2     Pins 2 & 3        Open           Open
                  closed          closed

    256KB        Pins 2 & 3     Pins 1 & 2       Closed          Open
                  closed          closed

    512KB        Pins 2 & 3     Pins 2 & 3       Closed         Closed
                  closed          closed

           CACHE CONFIGURATION

       Setting               JP4

       Enabled        Pins 2 & 3 closed

      Disabled        Pins 1 & 2 closed

                            CPU SPEED SELECTION

      Speed               JP5               JP10               JP11

      25MHz            Pins 1 & 2           Open              Closed
                        closed

      33MHz            Pins 2 & 3          Closed              Open
                        closed

      50iMHz           Pins 1 & 2           Open              Closed
                        closed

      66iMHz           Pins 2 & 3          Closed              Open
                        closed

                            CPU TYPE SELECTION

         Type                JP14             JP15             JP16

       80486SX            Pins 1 & 2          Open           Pins 2 & 3
                            closed                            closed

   486Overdrive (168      Pins 1 & 2       Pins 1 & 2     Pins 1 & 2, 3 &
         pin)               closed           closed          4 closed

   486Overdrive (169      Pins 1 & 2       Pins 2 & 3     Pins 1 & 2, 3 &
         pin)               closed           closed          4 closed

       80487SX            Pins 1 & 2       Pins 2 & 3     Pins 1 & 2, 3 &
                            closed           closed          4 closed

       80486DX            Pins 1 & 2       Pins 1 & 2     Pins 1 & 2, 3 &
                            closed           closed          4 closed

       8048DX2            Pins 1 & 2       Pins 1 & 2     Pins 1 & 2, 3 &
                            closed           closed          4 closed

                           PCI TRIGGER SELECTION

          Setting                    JP27                    JP28

  »         ISA IDE           Pins 2 & 3 closed             Closed

             Level            Pins 1 & 2 closed              Open

              Edge            Pins 4 & 5 closed              Open